<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>
  <div id="app"> 
    <button @click="vif=!vif">切换显示隐藏</button>
    <div v-if="vif" style="background-color: red; width: 200px; height: 200px;"> 
      v-if
    </div>
    <hr>
    <button  @click="vshow=!vshow">切换显示隐藏</button>
    <div v-show="vshow" style="background-color: yellow; width: 200px; height: 200px;"> 
      v-show
    </div>
  </div>
</body>
<script src="/node_modules/vue/dist/vue.js"></script>
<script type="text/javascript">
var vm = new Vue({
   el: '#app',
   data:{
       vif: true,
       vshow: true
   }
})

/*
v-if 和v-show  用于控制元素显示隐藏  ， 
语法 v-if ="指定bool值"  v-show一样

v-if 控制元素是否生成
v-show 控制元素是否显示隐藏  

*/
</script>
</html>